linux-kernel - [PATCH 0/3] exit: avoid O(n ** 2) thread-list scan on group-exit if possible

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Message-ID: <20141120183400.GA9622@redhat.com>
Date:	Thu, 20 Nov 2014 19:34:00 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Aaron Tomlin <atomlin@...hat.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Sterling Alexander <stalexan@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] exit: avoid O(n ** 2) thread-list scan on group-exit
	if possible

On 11/18, Oleg Nesterov wrote:
>
> but I found other bugs in this area. Fix them first. This is also
> preparation for the next changes in exit_notify() paths.

Finally the optimization I had in mind from the very beginning.

Probably this is not the last series... in particular it seems that we
have some problems with sys_setns() in this area, but I need to recheck.
Plus more cleanups/microoptimizations.

Oleg.

 kernel/exit.c |   50 +++++++++++++++++++++++++-------------------------
 1 files changed, 25 insertions(+), 25 deletions(-)


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